Yes, it is sending on all 8 freq. I can confirm that by looking at Gateway Live data. Filtering by DevAddr I see there all messages (on all channels), but in Application can see only 3 basic.
I’ve never needed to add each frequency manually, because it works on standard frequencies. Is that something new (I didn’t add any new devices in last 3-4 months)? Where should I do that?
EDIT: I see this issue was raised less then 2 years ago: The packages are lost between the gateway and the application in v3